Leg-irons are restraints that are used to cuff or shackle an individual's feet together. There are a variety of synonyms for leg-irons, including ankle cuffs, leg cuffs, shackles, fetters, leg restraints, leg manacles, and leg iron shackles. These restraints have been used throughout history in various ways, such as restraining prisoners, punishing slaves, and controlling convicts. In modern times, leg-irons are primarily used in law enforcement and correctional facilities to prevent prisoners from escaping or causing harm to themselves or others. While the terms may differ, the purpose of these restraints remains the same, to restrict an individual's movements and prevent them from causing harm.